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Method and device for sampling an image sensor

a technology for image sensors and sampling devices, applied in the direction of picture signal generators, solid-state device signal generators, television systems, etc., can solve problems such as recording pulsed light sources, and achieve the effect of reducing aliasing effects and improving signal-to-noise ratio

Active Publication Date: 2018-01-18
ROBERT BOSCH GMBH
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AI Technical Summary

Benefits of technology

The patent describes a device that uses filters to capture different light properties, such as color or polarization, and assigns information to specific points on the image sensor. This allows for the device to reconstruct the image at a specific point on the sensor. The device uses a triangular lattice configuration with four different image sensor types, but can also be used with other combinations of image sensor types. Overall, this device enables quick and efficient imaging and control of the image sensor.

Problems solved by technology

In the temporal signal, aliasing effects show up as rolling shutter effects (a straight object is imaged as curved), effects such as the “wagon wheel effect” (from a particular speed, a wheel appears to rotate backwards), and problems in the recording of pulsed light sources (LED traffic signals, rear lights of vehicles).

Method used

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  • Method and device for sampling an image sensor

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Embodiment Construction

[0050]In the following description of advantageous exemplary embodiments of the present invention, identical or similar reference characters are used for elements shown in the various Figures having similar function, and repeated description of these elements is omitted.

[0051]For the understanding of the approach proposed here, first the functioning of image sensors is again discussed. The current functioning of image sensors produces a relatively short exposure time compared to the resulting frame rate. The exposure time acts as a low-pass filter that can be regarded in idealized form as a rectangle in the time domain. In the frequency space, the rectangular low-pass filter having broad texp is represented as an si function:

rect(ttexp.)?si(πftexp.)?indicates text missing or illegible when filed(1)

[0052]The first zero crossing of the si curve is at:

πftexp.=π(2)fcutoff=1texp.(3)

and is at the same time a standard approximation of the cutoff frequency of the low-pass filter. If we comp...

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Abstract

A method for sampling an image sensor, the image sensor having a lattice structure having a plurality of triangular sensor elements. In the lattice structure, sensor elements situated adjacent to one another are configured to detect light having respectively different light properties. The method includes a step of reading out the image sensor by sampling a plurality of sensor elements of the lattice structure that are configured to detect light in a same first wavelength range, one sensor signal being read out per sensor element in the step of reading out. In addition, the method includes a step of buffering the read-out sensor signals and a step of producing an item of image information assigned to a point of acquisition of the image sensor, using the buffered sensor signals.

Description

RELATED APPLICATION INFORMATION[0001]The present application claims priority to and the benefit of German patent application no. 10 2016 212 791.8, which was filed in Germany on Jul. 13, 2016, and German patent application no. 10 2016 216 985.8, which was filed in Germany on Sep. 7, 2016, the disclosures of both of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The present invention relates to a device and a method of the type indicated herein. The subject matter of the present invention is also a computer program.BACKGROUND INFORMATION[0003]Modern image sensors standardly function according to the following configuration:[0004]1. An optical mechanism produces a light image on a flat sensor (also called an image sensor or imager).[0005]2. The image sensor samples this image spatially and temporally.[0006]3. The temporal sampling is determined by the frame rate.[0007]Here, the standard camera components fulfill the following functions:[0008]The optical mechani...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N5/378H04N9/04H04N5/357H04N23/12
CPCH04N5/378H04N9/045H04N5/3575H04N25/616H04N25/633H04N25/771H04N25/134H04N25/441H04N25/75
Inventor GEESE, MARCSEGER, ULRICH
Owner ROBERT BOSCH GMBH
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